Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
trung cap » truong cao, trung tam
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
tung cap » cung cap, thong cap, trong cap
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu lang) OR (chieu sang)) - thanh ((tung cap) or (trung cap)) trong cong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (chieu sang)) - thanh ((tung cap) OR (trung cap)) trong cong manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu lang) OR (chieu sang)) - thanh ((tung cap) or (trung cap)) trong cong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) OR (chieu sang)) - thanh ((tung cap) or (trung cap)) trong cong manh toan ban*.